Color-developing compositions and their use

Details Color-developing compositions and their use Color-developing compositions and their use

B - Operations, Transporting

41

M

B41M 5/155 (2006.01) B41M 5/333 (2006.01)

Patent

CA 2074026

A color-developing composition comprises a multi- valent-metal-modified salicylic acid resin (Resin A) and a polycondensation resin (resin B) at a weight ratio of 90-30 to 10-70. Resin A is composed of 5-35 mole% of a structural unit (I) and 65-95 mole% of at least one structural unit (II) or 65-95 mole% of a coupled structural unit of at least one unit (II) and at least one unit (III) and has a weight-average molecular weight of 350-5,000. Resin B is composed of the unit (II) and/or the unit (III) and has a weight- average molecular weight of 350-5,000. Image (I) Image , Image , Image or Image (II) Image , Image or Image (III) wherein Z represents M/m, M being a metal ion of m valence and m being an integer; R1 and R2 represent H or a C1-12 alkyl, aralkyl, aryl or cycloalkyl group; R3 and R6 represent H or a C1-4 alkyl group; and R4 and R5 represent H or CH3.

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